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Updated: Jun 5, 2026

High-Speed Magnetic Tweezers for Nanomechanical Measurements on Force-Sensitive Elements

High-Speed Magnetic Tweezers for Nanomechanical Measurements on Force-Sensitive Elements

Published on: May 12, 2023

Ice-phase optothermal tweezers.

Jianxing Zhou^1,2, Yuhang Peng^1,2, Peng Du^1,2

¹Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Physics and Optoelectronics Engineering, Shenzhen University, Shenzhen, China.

Nature Communications

|June 3, 2026

Summary

This summary is machine-generated.

Researchers developed ice-phase optothermal tweezers (IOT) for precise assembly of micro- and nanostructures. This new method enables rapid, programmable manipulation of diverse materials at cryogenic temperatures for advanced applications.

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Area of Science:

Cryogenic engineering
Nanotechnology
Materials science

Background:

Deterministic assembly of heterogeneous micro- and nanostructures is difficult due to Brownian motion and material limitations.
Existing methods lack precision and cross-material compatibility for complex structure fabrication.

Purpose of the Study:

To present a novel platform for precise, programmable manipulation and assembly of diverse micro- and nanostructures at cryogenic temperatures.
To overcome limitations of current assembly techniques, enabling fabrication of advanced materials.

Main Methods:

Developed ice-phase optothermal tweezers (IOT) utilizing the ice-water interface for manipulation.
Employed optothermally induced melting zones for directed transport and assembly with nanometer resolution.
Manipulated various targets including nanoparticles, proteins, DNA, and microbubbles within ice.

Main Results:

Achieved fast (10-100 μm/s) and programmable manipulation of diverse targets.
Fabricated multi-material heterostructures with tailored anisotropic and chiral optical properties.
Demonstrated nanometer-scale resolution in directed transport and assembly.

Conclusions:

IOT provides a versatile cryogenic platform for meta-structure fabrication and nanoparticle studies.
Enables applications in chiral photonics and polarization-controlled nano-optical devices.
Unifies precise control across fluidic and solid-state regimes for advanced material assembly.